[Event "URS-ch41 Semifinal"]
[Site "Frunze"]
[Date "1973.07.??"]
[Round "?"]
[White "Lein, Anatoly"]
[Black "Mamatov, Dair"]
[Result "0-1"]
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bb7 7. Re1 Be7 8. c3 O-O 9. d4 exd4 10. e5 Ne8 11. cxd4 d6 12. Nc3 dxe5 13. dxe5 Nb4 14. Qe2 c5 15. Rd1 Qc8 16. a3 c4 17. Bxc4 Nc2 18. Qxc2 Qxc4 19. Nd4 Nc7 20. Qe2 Qxe2 21. Ndxe2 Rfd8 22. Be3 Nd5 23. Nxd5 Rxd5 24. Rxd5 Bxd5 25. Rd1 Bc4 26. Nc3 Rd8 27. Rxd8+ Bxd8 28. Bd4 Be7 29. b4 a5 30. Bc5 Bxc5 31. bxc5 b4 32. axb4 axb4 33. Na4 Bb5 34. Nb2 Kf8 35. f4 Ke7 36. Kf2 Ke6 37. c6 Bxc6 38. Nd3 b3 39. g4 Kd5 40. Ke3 Kc4 41. f5 Bd7 42. h3 Kd5 43. Kf4 Kd4 44. Nb2 Kc3 45. Nd1+ Kd2 46. Nb2 Bb5 47. g5 Kc2 48. h4 Kxb2 49. h5 Kc3 50. e6 fxe6 0-1